Electric-arc lamp.



No. 680,082. Patented Aug. 6, i901.

n. STENZ.

ELECTRIC ARC LAIP.

(Application filed Dec. 3, 1900.)

(lo Model.) 2 Sheets-Sheet l.

"is NORRIS wzrzns co. PHOTD-LfrHOu WASHINGTON, a. c

No. 680,082. Patented Aug. 6, |90l.'

H. STENZ.

ELECTRIC ARC LAMP. (Applicatidn filed Dec. 3. 1900. (No Model.) 2 Sheets -Sheet 2.

U ITED STATES PATENT OFFICE.

HENRY STENZ, OF CHICAGO, ILLINOIS.

- ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 680,082, dated August 6, 1901.

Application filed December 3, 1900. Serial No. 38,385. (No model.)

To all whom it may concern.-

Be it known that I, HENRY STENZ, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Arc-Lights, of which the following is a specification.

My invention relates to certain improvements in arc-lights, pertaining especially to the means employed for supporting and surrounding the carbons, the objects of the same being to increase the life of the carbons, to render the trimming of the same easier, and to produce a more efficient and satisfactory lamp in other important particulars.

In the drawings, Figure 1 is a side elevation of a complete lamp; Fig. 2, a plan of the globe cover; Fig. 3,a horizontal section of said cover .inline 3 3 of Fig. 4; Fig. 4:, an axial section of the globe and lower-carbon support;

Fig. 5, a horizontal section of Fig. 4. in line- 5 5; Fig. 6, a similar section of the same fig me in line 6 6; and Fig. 7, a section corresponding to Fig. 5 of the globe alone, showing a modification in the form of the lower-carbon holder.

Referring to the drawings, A is the frame of the lamp, B the upper-carbon holder, and C a supporting-base. This base is provided with a central vertical opening a, ahorizont-al annular supporting-plate c, and a surrounding vertical flange 0 A preferably three-legged stand D rests, by means of the legs cl, upon the annular supporting-plate and is prevented from lateral movement thereupon by the vertical flanges 0 Each leg is provided with an adjustable hook d, the point (1 of which engages the under surface of the annular plate 0, and the upper end of which, (1 is slotted at d to receive a screw (1 by means of which the hook is adj ustably clamped to the plate.

Means are thus provided for securely fastenin g the stand D to a wide range of base-plates of whatever thicknesses.

The top of the stand (Z is preferably of an nular form and provided with two inwardlyextending hooks or lugs 61 d opposite which isa lug cl", in which is a threaded screw 01.

. The globe E is provided at the bottom with an outwardly-extending flange e, adapted to extend beneath the hooks and the screw and providing means for securely fastening the globe to the stand. Said globe is preferably provided with a bottom 6, closed except a central opening 6 through which the carbon may extend and about which is secured a horizontally-projecting flange f of the lowercarbon holder F, and an inner fastening-plate f, secured to said flange by means of screws f Washers f preferably of asbestos, are interposed between the flange and the globe and the plate and the globe to protect the latter from the heat, and also to effectwhen desired an approximately tight closure. The lower-carbon holder F extends down within the open stand D, preferablyin tubular form and is provided at the bottom with a clamp* ing-ring G, having a set-screw g bearing upon the holder itself and drawing the ring tightly against the carbon.

The lower wire H is secured directly to the lower-carbon holder and has no connection with the base or stand, thus removing the necessity for all insulation which has to be used in devices of this sort of the ordinary construction. In this case the insulation is afforded entirely by the bottom of the globe E.

' Upon the top of the globe is a hollow cap or cover K, in the bottom 70 of which are a series of openings 70 and in the sides another series of openings k furnishing an indirect passage through the cap for the gases produced within the globe. In the top Z0 of the cap is a central opening it", in which is provided a hollow carbon-guide M, perforated at m m to allow the carbon to pass through and having a horizontal flange m to rest upon the top of the cover. is centered upon the globe by means of pins k extending within the globe.

Considerable variation in detail is possible from the exact construction described, and for that reason I do not limit myself to the preferred form herein shown.

I claim as new and desire to secure by Let 7 ters Patent 1. In an electric light, the combination with a suitable supporting-base, 0, provided with a horizontal supporting-plate, o, of a stand, D, having legs, d, resting upon the plate, longitudinally-adjustable hooks, d, provided The cap or cover with points, al embracing the under side of the plate, and slots, (Z and screws, d threaded in the legs and passing through the slots, whereby the hooks may be adjustable longitudinally to fit the base, substantially as described.

2. The combination with the supportingbase, 0, of the open stand, D, secured to the base, the globe, E, secured to the stand and provided with the bottom, 6", and the carbonholder, F, secured to said bottom and extending downward within the open stand; substantially as described.

3. The combination with a hollow cap or cover, K, provided with perforations,-lc,-k

and the centralopening, 70 in the top, of the hollow carbon-guide, M, having the flange,

m and the perforations, m, m, to receive 15 the carbon, the body of the guide projecting downward into the opening, 10 and the flange, m ,,resting upon the top of the cover; substantially as described. a

In witness whereof I have hereunto set my 20 hand, at Chicago, in the county of Cook and State of Illinois, this 8th day of November, A. D. 1900.

HENRY STENZ.

Vfitnesses:

CHAS O. SHERVEY, S. BLISS. 

